[PATCH 4/6] f2fs: mark gc_thread as NULL when thread creation failed

[Namjae Jeon]

From: Namjae Jeon <namjae.jeon@xxxxxxxxxxx>

When gc thread creatio failed, mark gc_thread as NULL to avoid
crash while trying to stop invalid thread in
stop_gc_thread->kthread_stop.
Instead make it return from:
	if (!gc_th)
       return;

Signed-off-by: Namjae Jeon <namjae.jeon@xxxxxxxxxxx>
Signed-off-by: Amit Sahrawat <a.sahrawat@xxxxxxxxxxx>
---
 fs/f2fs/gc.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index d344784..21f3ec6 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -107,6 +107,7 @@ int start_gc_thread(struct f2fs_sb_info *sbi)
 				"f2fs_gc-%s", dev_name(sbi->sb->s_bdi->dev));
 	if (IS_ERR(gc_th->f2fs_gc_task)) {
 		kfree(gc_th);
+		sbi->gc_thread = NULL;
 		return -ENOMEM;
 	}
 	return 0;
-- 
1.7.9.5

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